pyhton object is not subscriptable 解决

这是网上的错误例子：

dicts = [
    {'name': 'Michelangelo',
     'food': 'PIZZA'},
    {'name': 'Garfield',
     'food': 'lasanga'},
    {'name': 'Walter',
     'food': 'pancakes'},
    {'name': 'Galactus',
     'food': 'worlds'}
]

string = "Hi, I'm {name} and I love to eat {food}!"

def string_factory(dicts, string):
  for item in range(0, len(dicts)):
    values = item[dicts]
    single_dict = string.format(**values)
    print(single_dict)

string_factory(dicts, string)

'int' object is not subscriptable

我发现只要这样就会报错：

item=0
print(item["asdf"])

TypeError: 'int' object is not subscriptable

item=0.1
print(item["asdf"])

TypeError: 'float' object is not subscriptable

初步总结：把int型变量当dict使用，取值就会报错